Is it a good idea to put all of your includes in one header file?

Question

What is the best practice for C what you put into a C header file?

Is it useful to put all the includes used for a program across multiple source files in one header

Answer 1

A header file is actually what you include from your c program. It containts data structures like structs, macros, function definitions etc.. Sometimes a single header file can be ok, buy if your program grows into logical components, you may need more.